#mask_div {width: 100%;height: 100px !important;position: absolute;margin-top: 450px;}
#mask_div  #mask_box {width: 1200px;height: 100px;margin: 0 auto; }

#mask{width: 250px;height: 100px;opacity: 0.9;background: #000;margin-left: 50px;}
#mask ul{position: absolute;margin-top: 20px;}
#mask ul li{margin-left: 5px;float: none;font-size: 15px;color: #fff;height: 15px;margin-top: 5px;}
#mask ul li img{width: 15px;height: 15px;margin-left: 3px;float: left;}
#mask ul li span{margin-left: 3px;line-height:15px;float: left;color: #fff;}